Prospects for using membrane distallation for reprocessing liquid radioactive wastes
Membrane distillation is a promising method for deep desalinization and for removal of impurities of different nature from water. The crux of the method is as follows. The initial (hot) solution, heated up to 30-70{degrees}C, is fed into one side of a hydrophobic microporous membrane. A less heated (cold) distillate moves along the other. Since the membrane is hydrophobic and the pores are small ({approximately}1 {mu}m and less), the liquid phase does not penetrate into the pores in accordance with Kelvin`s law. The vapor evaporating from the surface of the hot solution (the evaporation surface in this case are solution meniscuses forming at the entrance into a pore) penetrates into the pores of the membrane, diffuses through the air layer in the pore, and condenses on the surface of the menisci of cold liquid. In the process rarefaction is produced in the pores, and this accelerates evaporation and therefore increases its efficiency.
- OSTI ID:
- 81575
- Journal Information:
- Atomic Energy (New York), Vol. 75, Issue 5; Other Information: PBD: May 1994; TN: Translated from Atomnaya Energiya; 75: No. 5, 345-350(Nov 1993)
- Country of Publication:
- United States
- Language:
- English
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